Water-tube boiler.



H. A: TURNBULL,

WATER TUBE BOILER.

APPLICATION man IUD/22,3915.

FL D Patented Jun 5, 3917.

2 SHEETS-SHEET I.

.H, A. TURNBULL,

WATER TUBE BOILER.

APPLICATION FILED JULY 22,1915.

W 13 Q Q 1 5 n 3 2 mm NZ A. .m m m i m A H .V% AL v l m 2 m HENRYALEAANDERTURNBULL, OF SURREY HTLLS, VICTORIA, AUSTRALIA.

WATER-TUBE BOILER.

To'all whom it may concern:

Be it known that LHENRY ALEXANDER 'TURNBULL, residing at 50 New-tonstreet,

Surrey Hills, in the-State of Victoria and Commonwealth of Australia, asubject of the King of Great Britain, have invented certain new anduseful Improvements in Water-Tube Boilers, of which the-following is aspecification.

This invention is devised to secure greater efiiciency in the productionof and maintenance of a steam supply for marine and other engines, and.for all other purposes. One of the characteristics and objects of thecombination of parts as hereinafter described is the'provision of a setof steam generating elements which shall be separately removable andinterchangeable and at the same, time adapted to produce the most rapidcirculation and a highpressure of steam with economy of fuel. Anotherobject is to attain the before stated result with the minimum ofexpenditure for cleaning and repairs and to enable the same to beconducted'with little inconvenience and without long stoppage of theengines or work.

One of the principal features of my in-' vention is that the boilerconsists of a number of sets of straight vertical water tubes or steamgenerating tubes. A number of these are joined at'the top to a headertube,

which is horizontal, all being of convenient length and diameter to suitthe various requirements and purposes. A similar header is provided "atthe bottom. The two headers and set of vertical tubes constitute one ofthe elements referred to. of the top and bottom header by -the verticaltubes in the -manner described allows, tubes of smaller size to be used,and ob tains greater effective circulation of water through the tubes,than previously practicable on a given basis. The number oftubes and thelength and size are adjusted to suit requirements. Any required numberof such elements are placed within the furnace combustion space side byside. All the bottom headers are connected with a mud drum and the topheaders with a steam water drum. Each bottom header and top header withthe set of vertical tubes forms an ele-' ment which element isinterchangeable with other elements thus greatly facilitating cleaningand repairs.

One embodiment of. my invention and Specification of Letters Ifatent.Application filed .iul 22, 1915. Serial No. 41,221.

- looking in the direction of arrow The connectionv ]Patented June 5,1917.

some modification to'suit differing conditions are illustrated in theaccomp nying drawings in which Figure 1 is a side sectional elevation ofboiler with transverse steam and water drum.

Fig. 2 is an end sectional elevation of boiler taken through line X.XFig. l and Fig. 3 is a back view of Fig. 1 looking in the directionofarrow Y. p

Fig. 4 is a side sectional elevation of boiler with longitudinal steamand water drum.

Fig. 5 is an enlarged section through downtake mud drum and lowerheader.

Fig. 6 is'an alternative method of hand hole fitting at front end ofheaders.

Fig. 7 is an enlarged section of mud drum showing an alternative methodof fixing lower header in same.

' Fig. 8 is an elevation of mud drum and with lower header as show tosame. v

Fig. 9 is an arrangem'ntof tubes and cast iron spreaders for supportingbaffles.

Fig. 10 is an elevation of tubes showing baffles. v I

Fig. 11 is a view showing a valve and fitting to a down pipe.

in Fig. 5 fitted One of the most useful ordinary embodiments of myinvention is illustrated in Figs. 1, 2 and 3. The part marked 2 isthe-furnace, 4c'the furnacebar, 6 the furnace door opening, and 8 ispart of the fire brick lining. 10 is the bottom header and 12 the topheader, 13 the vertical tubes, 14 the mud drum, 15 the water andsteam'drum, 16

down comer, 17 man hole door, and 18 the steam o'fi' take. 19 shows thejointing. of the upper end of the down comer. The end is expanded intothe bottom of the steam and water drum, strengthening plate 20 beingfitted inside the shell plate 21. The element will be seen in Fig. 1consisting of bottom header 10, top header 12, and set of vertical tubes13, which are fifteen in this case, but may be any number more or less.The joint between the upper header and the water drum may be formed -inone or other of the ways shown in Figs. 5 or 7. Both or either of thesemay be applied to top or bottom headers. The vertical tubes may befitted to the top header by expanding and the bottom header by screwingor if desired both'top and bottom ends may be expanded into the'top andbottom headers respectively. Each down comer is joined tothe mud drum,by a'joint as shown. 22 are the screw plugs at the top 'of each tube13. 23 is the uptake, 24 is the steel casing of boiler, which may havesuitable doors or openings as at 47 for inspection and cleaningpurposes. The boiler is sometimes portable being in- 1 closed entirelyby metal casing" or it may be totally inclosed by brick work or partlyof one and partly of the other.

Fig. 2 isa sectional elevation showing the same' parts and also gageglass. 25 and diagrammatically superheater 26 (Fig; 1).

Fig. 3 illustrates an endsectional elevation of the boiler.

.. 5 and 6 respectively.

In the bottom of the mud drum oppositev cover 31,'closing the ends ofmud drum. At v the front end of each top and bottom'head'er is fitted aremovable screw cap 29 or a hand hole door 30 both as shown in detail'inFigs. The mud drum is 'shown square but both it and'the headers may beof square, round or oval section.

always necessary, fitted at its top endwitl a valve such as a mitervalve seating upon the annular top of the down comer.

wardly through a screw passage'in the top of the. drum andbeing; at thetop attached to a wheel exterior of the drum by turning is illustratedin Fig. l1. l6 is-the 'down 1 ,comer' which in this case is shownattached to the shell 21 of the steam water drum by means of a flange52. The down comer extends upwardly to within the steam water drum 15and is formed with a miter seat 53 upon. which seats the valve 54 whichhas a stem 55 extending to'a wheel handle 56 external to the drum. Asuitable packed gland connection 57 is to keep the valve stem.

steam tight.

- The elements are sometimes placed one alittle forwardof the other sothat the position of the vertical pipes is staggered as shown'in Fig. 9,in order to better attain the advantage of the products of combustion.

In the steam water drum for the purpose I of more effectively separatingthe water from the steam as it emerges from the top header a smallbaffle plate 49 (Fig. 1) may be provided opposite the opening where thesteam emerges. v

The water level in the steam water drum is arranged to be at a desiredpredetermined position either above or below the entrance Y The valve'is attached to a stem extending up- I In Fig.- 4isrepresented a from theheader. I A perforated dry pipe 48 'ora steam dome. may be attached. Theeconomizer referred to-may be at any suit able position inthe upper partof the fur-*- I nace chamber or elsewhere (one example beingshown inFig. 1.) Some of the orditiveness of the foregoing devices consists inthe division of the chamber and thedirection of the furnace gases bymeans of two;

three or more baflles so constituted'that'the gases from the furnace arecarried across the vertical tubes at right angles. thereto. Thismay beefi'e'cted by the means ill11s' trated in Fig. 9. The two spreaderplates Y I 32,- 33, having holes to fit around the tubes are clampedtogether by bolts 34. -These plates support suitable corresponding firebrick strips 35 thus forming the equivalent of one bafil'e36 and anotherbafiie-37. This,

arrangement in conjunction with the shape of the furnace and the fluespace .provlded at each side 38 and 39 enable the superhea'ter positionshown Where it receives the heat from the furnace gases after thetempera- I 26 to be very advantageously placed in'the" Each down comermay be though it is not ture has been lowered to a suitable degree.

The path of the gases is shown by the arrows, being from left to rightbetween and around the tubes past thesuperheate'r back from right toleft between and around-the tubes then up to the top space which isspecially adapted by this construction and arrangement for theeconomical employment of the economizer.

modification or alternative in which the water steam drum 15 islongitudinal with the headers. In this casethe uptake is on one'side ofthe boiler accordingly. Otherwisethe construction is the same as'hereinbefore described.

andthe connections of parts are adjusted Fig. shows bottom header 1(vertical tubes 13," and one method of joining the element to themud drum'14 consisting in flange 4O whichmay be screwed. as shown or may bewelded to theheader. 16isthe down comer expanded. at 41 into the muddrum. 27 are hand holes and 28 doors for A inspecting and cleaning. I

In Fig.-6 is shown. the front'end'of a header with hand hole and door30' instead of screw cap. The flanges 4.0'shown in Fig.

5 are secured to the mud drum asshown in Fig. 8. Theflange of the upperheader is secured to -the saddle plate Qfin a similar manner.

In, Fig. 7 is shown analte'rnative method of securingtheheader to themud drum by I means of expanding. 1.0 isth'e header, 149' the mud drum,43 the nipplefwhieh is expanded into the header at one end, and into themud drum at the other When this method of connecting the elements isused the top header is connected to the steam water drum in a likemanner.

I claim 'A Water tube boiler, comprising an inner and outer-lining, acombustion chamber in the lower portion of the inner lining, a pluralityof heating elements each consistingof a plurality of vertical tubes andupper and lower headers with which the tubes are connected, the elementsbeing arranged with their tubes in staggered relation and their headerson the same level and close together,

the lower headers being arranged directly above the combustion chamber,horizontal bafile plates projecting from opposite sides of the innerlining and through which the tubes pass, a steam drum, a mud drum, and aplurality of down-comers connecting the steam and mud drums, the steamand mud drums and down-comers being outside of the inner lining.

Signed at Melbourne, in the State of Victoria, Australia, by me, thesaid HENRY ALEXANDER TURNBULL this 25th day of May, A. D. 1915.

HENRY ALEXANDERTURNBULL.

In the presence of CHARLES NICHOLAS CoLLIsoN,

AMY MABEL VOIG

